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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    Well the news is not good. Believe we have a blown head gasket on the starboard side. Got water in the oil. The IR on port reading 150 and on the starboard side reading around 185.
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    I did. Thanks for helping me and everyone I really appreciate all the help. Definitely helps. I got gaskets on order for when I check this.
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    Update on the boat: Just got back from the lake. I didn’t take it out on the water I kept the boat on the trailer. After replacing the circulation pump. Let it run for close to 15 minutes. Temp got up a little past 170. One manifold is a little hotter than the other. The risers are cold to the...
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    Dang I didn’t think they would last that long.
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    while I got the backseat out and plenty of room. Now the time to get it all done. Thanks for the tip I will look them up now. Should I go with oem or aftermarket ones good?
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    Is it possible the manifolds and risers need replacing? The manifolds and risers are the originals that came with the boat I believe. Boat has never been in salt water. The original owner let the boat sit on the trailer for several years before I purchased it.
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    I will have to go to the store tomorrow when they open and get some hose and test the ball. Beginning to wonder if I got a blown head gasket at this point. I went ahead and ordered a new circulation pump. Took the old one possibly the original off and has a lot of pitting around where gaskets...
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    Thank you for all the help! I really appreciate it.
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    One side had water coming out of the ball valve. Went and did the other side no water came out of the valve. Not sure if that is cause when I did the port side it drained all the water out of the engine.
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    I believe so I just took the bottom hose off the check ball valve and had a ton of water in it.
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    Manifolds were reading 170, risers were colder than that could touch them. Thermostat housing was reading 200 on the IR
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    have good flow everywhere. Just checked new thermostat in water and it’s opening. Still overheating. I have no idea on this one.
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    I’m about to hook up hose and check with the IR. I took off the output of the raw water pump stuffed water hose down in the hose started taking off hoses one by one and have water coming out all hoses. Only one left to check is the hose that goes up to the T coupling from the distribution...
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    Thanks brother. I’m on way to Home Depot to get a IR gun
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    I haven’t looked into the check valve. I took it for granted I will check that as well. I got lazy thinking it either works or it’s doesn’t with the check valve. I need to look at the drain system again I can’t think off stop of my head as to which I have. I think it’s a 7 not sure. I can think...
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    I didn’t find any blockages. The old impeller looked brand new. None of the pieces were missing off the old one. I replace it every year. Figured better safe than sorry. I’m going to check the flappers this afternoon. It seemed like it stopped getting water to the thermostat. Since the risers...
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    Mercruiser 5.0 MPI Bravo 3 overheat 5 minutes after starting it up.

    I got a 2003 Sea Ray 220 with a Mercruiser 5.0 MPI Bravo 3. The engine will overheat 5 minutes after starting it up. I have replaced the impeller and the back part of the raw water pump (where the hoses intake and out hoses go). I have replaced the thermostat as well. The first 5 minutes warming...
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    Bravo 3 not going into gear

    Need some help guys. Took the boat out yesterday was running perfect then all sudden boat stopped put it in netural and shut motor down checked everything looked good. Fired up the motor went put it in gear and it was very hard to do and motor would rev up wasn't in gear then tried reverse same...
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    Led drain plug lights

    This may not be the right place in the forum for this but I was bored on eBay and saw led drain plug lights. Anyone have any experience with them? If so what's the best color to get?
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    5.0 mpi mercruiser wiring harness question

    5.0 mpi mercruiser wiring harness question. I found a plug that was up against the manifold riser area and it was touching them. The plug is on the opposite side of the engine where the ECM is located. The harness has wires in it then goes into this plug that only has one wire and makes a loop...
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